A trivial point that I forgot: what about women being only vowels? Does this mean that women are roughly only 20% of the population? It seems obvious that the women are sexually dominant--that they are the instigators/choosers and have multiple partners. We know that sex isn't for procreation, so what are the implications of these aspects of social engineering? Is it because in the 1920s, women were not assumed to be as productive, but that some women were deemed necessary to satisfy a vestigial sex drive? Or perhaps they wanted to keep some women as a fail-safe, in case of a widespread failure in the means of procreation?